Conquer
The
Academy
Welcome
back
Skip to content
Conquer
YOUR A LEVELS
Subjects
C
Cambridge
E
Pearson Edexcel
AQA
AQA
OCR
OCR
Competitive
Study space
Mistake Bank
AI Marking
Log in
Create free account
Study space
Mistake Bank
AI Marking
Subjects
C
Cambridge
E
Pearson Edexcel
AQA
AQA
OCR
OCR
Competitive
Log in
Create free account
Revision Notes
Practice Questions
Topical Past Paper Questions
Past Papers
Resources
Revision Notes
Practice Questions
Topical Past Paper Questions
Past Papers
Paper 4
/
Alternating Currents
Contents
Alternating Current: Start Here
Practise Alternating Currents
Contents
All chapters
Physics · 9702
Paper 4
Chapter 11 · Alternating Currents
Alternating Current Foundations
Alternating Current: Start Here
01
Motion in a Circle
Kinematics of Uniform Circular Motion
3
Circular Motion & Radians
Angular Speed
Linear Speed, Wheels & Gears
Centripetal Acceleration
2
Why Circular Motion Accelerates
Calculating Centripetal Acceleration
Forces in Circular Motion
8
Centripetal Force
How Circular Motion Changes
The Real Inward Force
Resolving Forces in Circular Motion
A Ball Inside a Smooth Cone
Conical Pendulum
Banked Roads & Aircraft
Circular Motion at a Latitude
02
Gravitational Fields
Fields & Newton's Law
7
Gravity and Gravitational Fields
Gravitational Field Lines
Newton's Law of Gravitation
Gravitational Field Strength
Field Strength of a Point Mass
Combined Gravitational Fields
Finding a Zero-Field Point
Potential & Energy
4
Gravitational Potential
Gravitational Potential Energy
Gravitational Energy Changes
Energy to Escape a Gravitational Field
Field & Potential Graphs
2
Gravitational Field Strength Graphs
Gravitational Potential Graphs
Orbits
4
Circular Orbits
Orbital Period & Kepler's Third Law
Orbital Period Graphs
Geostationary Orbits
03
Temperature
Thermal Transfer and Equilibrium
1
Thermal Energy Transfer and Equilibrium
Measuring Temperature
2
Thermometers and Thermometric Properties
Thermodynamic Temperature
Specific Heat Capacity
2
Specific Heat Capacity
Thermal Energy Sharing
Specific Latent Heat
2
Specific Latent Heat
Latent Heat Calculations
04
Ideal Gases
The Mole & the Gas Equation
5
Amount of Substance and the Mole
Boyle's Law and Charles's Law
The Equation of State
Counting Molecules: pV = NkT
Reading a pV against kT Graph
Kinetic Theory of Gases
5
The Kinetic Model of a Gas
How Molecules Cause Pressure
Temperature and Mean Kinetic Energy
Root-Mean-Square Speed
R.M.S. Speed Relationships
05
Thermodynamics
Internal Energy
1
Internal Energy
The First Law
3
The First Law of Thermodynamics
Work During a Volume Change
Work from a Pressure-Volume Graph
First-Law Applications
4
Applying the First Law
Using the Process Condition
First-Law Tables
Pressure-Volume Paths and Cycles
06
Oscillations
Describing Oscillations
7
Oscillations: Start Here
Period, Frequency and Angular Frequency
Phase Difference and Amplitude
What Makes Motion Simple Harmonic?
SHM as a Circular Projection
SHM Equations and Graphs
Speed and Acceleration in SHM
Energy of Oscillations
1
Energy in Simple Harmonic Motion
Damping and Resonance
2
Damping
Forced Oscillations and Resonance
07
Electric Fields
Electric Field Foundations
4
Electric Fields: Start Here
Drawing Electric Field Lines
Uniform Electric Fields
Charged-Particle Motion in a Uniform Field
Point Charges
4
Coulomb's Law
Charged Spheres in Equilibrium
The Field of a Point Charge
Combining Electric Fields
Electric Potential
4
Electric Potential
Electric Potential Energy
Field Strength from Potential
Zero Potential and Zero Field
08
Capacitance
Capacitor Foundations
4
Capacitance: Start Here
Capacitance of an Isolated Conductor
How a Capacitor Stores Energy
Calculating Capacitor Energy
Capacitor Networks
3
Capacitors in Series and Parallel
Reducing Capacitor Networks
Charge Sharing
Capacitor Discharge
3
Why Capacitor Discharge Slows Down
Capacitor Time Constant
Using the Discharge Equation
09
Magnetic Fields
Magnetic Field Foundations
3
Magnetic Fields: Start Here
Field Around a Straight Wire
Fields of Coils and Solenoids
Forces on Currents
2
Force on a Current
Forces Between Parallel Wires
Moving Charges
7
Force on a Moving Charge
Charged Particles in Circles
Period of a Charged Particle
The Velocity Selector
Velocity Selector Calculations
The Hall Effect
Using a Hall Probe
10
Electromagnetic Induction
Induction Foundations
4
Electromagnetic Induction: Start Here
Induction Experiments and E.m.f. Size
Magnetic Flux
Magnetic Flux Linkage
Faraday's Law
3
Faraday's Law
Motional E.m.f.
From Flux Graphs to E.m.f. Graphs
Direction & Applications
3
Lenz's Law
Eddy Currents and Braking
Rotating Conductors and Generators
11
Alternating Currents
Alternating Current Foundations
3
Alternating Current: Start Here
Reading an a.c. Graph
Sinusoidal a.c. Equations
r.m.s. Values & Power
4
What r.m.s. Means
Calculating r.m.s. Values
The a.c. Power Waveform
Mean Power in a Resistive Load
Rectification & Smoothing
5
Half-wave and Full-wave Outputs
The Single-diode Rectifier
Bridge Rectifier
How Smoothing Works
Smoothing Calculations
12
Quantum Physics
Light as Quanta
5
What a Photon Is
Photon Energy and Electronvolts
Photon Intensity
Photon Rate
Photon Momentum and Radiation Force
Photoelectric Effect
5
What the Photoelectric Effect Is
Explaining Photoelectric Observations
The Photoelectric Equation
Threshold Frequency & Wavelength
Photoelectric Graphs and Stopping Potential
Matter Waves
2
Wave–Particle Duality and de Broglie Wavelength
Electron Diffraction
Atomic Spectra
3
Recognising Line Spectra
Atomic Energy Levels and Transitions
Explaining Line Spectra
13
Nuclear Physics
Nuclear Reactions
3
Nuclear Equations
Mass–Energy Equivalence
Calculating Nuclear Reaction Energy
Mass & Binding Energy
4
Mass Defect & Binding Energy
The Binding-Energy Curve
Fusion & Fission
Why Fusion and Fission Release Energy
Radioactive Decay
5
Evidence for Random Decay
Random & Spontaneous Decay
Activity & Decay Constant
Half-Life & Exponential Decay
Using Radioactive-Decay Equations
14
Medical Physics
Ultrasound
3
How Ultrasound Builds an Image
Impedance, Reflection & Gel
Ultrasound Attenuation
X-ray Imaging
3
X-ray Production & Minimum Wavelength
X-ray Attenuation & Contrast
Computed Tomography
PET Imaging
1
PET Scanning
15
Astronomy & Cosmology
Stars & Distance
2
Luminosity & Radiant Flux
Standard Candles & Distance
Stellar Properties
2
Stellar Temperature from a Spectrum
Stellar Radius from Luminosity
The Expanding Universe
3
Redshift & Recession Speed
Hubble's Law
Expansion & the Big Bang
16
Definitions
A Level Definitions
15
Motion in a Circle
Gravitational Fields
Temperature
Ideal Gases
Thermodynamics
Oscillations
Electric Fields
Capacitance
Magnetic Fields
Electromagnetic Induction
Alternating Currents
Quantum Physics
Nuclear Physics
Medical Physics
Astronomy and Cosmology
Search resources